10344500  LITTLE TRUCKEE RIVER BELOW BOCA DAM, NEAR TRUCKEE, CA

LOCATION.--Lat 39°23'13", long 120°05'40", in NE 1/4 NW 1/4 sec.28, T.18 N., R.17 E., Nevada County, Hydrologic
   Unit 16050102, on right bank 800 ft upstream from mouth, 1,000 ft downstream from Boca Dam, and 6.2 mi
   northeast of Truckee.

DRAINAGE AREA.--173 mi2.

                                             WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--April to October 1890 (monthly discharge only), January 1911 to September 1915, January 1939
   to current year.  Prior to October 1976 published as "at Boca."  Monthly discharge only for January 1939 to
   September 1957, published in WSP 1734.

REVISED RECORDS.--WDR CA-79-3:  Drainage area.

GAGE.--Water-stage recorder.  Elevation of gage is 5,500 ft above sea level, from topographic map.  Jan. 1, 1911,
   to Sept. 30, 1915, nonrecording gage at site 650 ft downstream at different datum.  January 1939 to
   September 1957, records computed from daily log of rated settings of needle valve in dam, and from computed
   flow over spillway.

REMARKS.--Records good except flow less than 5 ft3/s, which is fair.  Flow regulated by Boca Reservoir
   (station 10344490) since 1938, Independence Lake (station 10342900) since 1939, and Stampede Reservoir
   (station 10344300) since 1969.  There is one transmountain diversion to Sierra Valley of about 6,000 acre-ft
   per year.  See schematic diagram of Truckee River basin.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 8,800 ft3/s, Dec. 24, 1955, from records of Washoe County
   Water Conservation District; no flow for many days in many years.


                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996
                                               DAILY MEAN VALUES

DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

  1       200   136         .08      .22      .29      306      518      300   586         102      213      210
  2       187   136         .08      .22      .30      306      648      300   586         181      205      209
  3       179   136         .08      .22      .30      306      728      334   523         482      204      209
  4       167   135         .09      .22      .78      417      727      355   486         564      211      208
  5       160   135         .08      .22      .74      497      727      355   434         572      202      207

  6       160   128         .08      .22      .65      386      725      355   401         696      179      206
  7       160   123         .10      .22      .69      295      725      355   463         769      171      206
  8       160    94         .12      .22   355         319      724      355   498         742      171      207
  9       159    73         .12      .22   648         333      724      380   498         723      179      205
 10       158    73         .12    25      687         333      499      394   498         723      183      173

 11       158    73         .18    99      687         448      238      393   498         571      183      154
 12       158    73         .45   139      476         517      241      393   582         494      183      163
 13       127    73         .22   164      345         517      296      393   588         534      182      168
 14       117    73         .17   164      373         425      295      393   587         503      182      168
 15       117    73         .18   164      391         430      295      394   586         426      196      169

 16       116    73         .17   124      434         466      296      472   585         363      204      169
 17       116    73         .16    41      494         467      296      506   584         346      203      168
 18       124    73         .16      .14   495         572      297      682   583         280      203      168
 19       154    73         .15      .13   550         641      297      795   663         252      202      167
 20       160    73         .14      .10   903         755      297      794   918         219      202      167

 21       170    73         .14      .12  1210         896      297      794   827         185      201      166
 22       170    73         .15      .10  1010         935      298      775   840         155      200      166
 23       170    73         .16      .10   715         935      206      762   828         124      203      187
 24       176    73         .16      .12   306         935      153      700   811          96      206      198
 25       181    73         .16      .13   306         678      154      661   757          96      205      197

 26       181    37         .16      .10   306         465      199      661   328          96      205      197
 27       202      .08      .17      .19   306         424      251      702      .52       97      210      196
 28       189      .08      .18      .22   306         582      251      797      .55      150      213      195
 29       188      .08      .18      .24   306         573      280      799      .60      219      212      195
 30       188      .08      .21      .26      ---      518      299      680    18         249      211      194
 31       173      ---      .20      .28      ---      518      ---      586      ---      235      211      ---

TOTAL    5025  2301.32     4.80   924.21 11612.75    16195    11981    16615 15557.67    11244     6135     5592
MEAN      162     76.7      .15     29.8      400      522      399      536      519      363      198      186
MAX       202      136      .45      164     1210      935      728      799      918      769      213      210
MIN       116      .08      .08      .10      .29      295      153      300      .52       96      171      154
AC-FT    9970     4560      9.5     1830    23030    32120    23760    32960    30860    22300    12170    11090



                   10344500  LITTLE TRUCKEE RIVER BELOW BOCA DAM, NEAR TRUCKEE, CA--Continued

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1911 - 1915, BY WATER YEAR (WY)

          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

MEAN     22.8     38.1     29.2     83.4     75.5      196      721      790      582      169     36.5     26.3
MAX      34.2     58.4     39.3      283      173      558     1367     1260     1211      435     66.3     35.7
(WY)     1915     1913     1914     1914     1914     1914     1914     1911     1911     1911     1911     1912
MIN      14.1     28.4     23.2     20.5     28.4     56.3      106      379      212     50.7     20.1     14.4
(WY)     1914     1915     1912     1913     1912     1912     1912     1912     1913     1912     1915     1915


SUMMARY STATISTICS                      WATER YEARS 1911 - 1915

ANNUAL MEAN                               193
HIGHEST ANNUAL MEAN                       387              1914
LOWEST ANNUAL MEAN                         94.7            1912
HIGHEST DAILY MEAN                       2360       Apr 15 1914
LOWEST DAILY MEAN                            .00    Sep 26 1911
ANNUAL SEVEN-DAY MINIMUM                     .00    Sep 26 1911
ANNUAL RUNOFF (AC-FT)                  140100
10 PERCENT EXCEEDS                        800
50 PERCENT EXCEEDS                         49
90 PERCENT EXCEEDS                         16



STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1939 - 1969, BY WATER YEAR (WY)

          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

MEAN     89.7      106      144      156      160      132      264      426      315      159      146      120
MAX       303      611      856      649      606      442      808     1647      974      389      408      414
(WY)     1968     1951     1951     1965     1963     1967     1952     1952     1967     1967     1958     1952
MIN      .000      .12      .20     .000     .000     .000     .000     .000     .000     .000     .000     .000
(WY)     1940     1967     1960     1939     1939     1939     1939     1939     1939     1939     1939     1939


SUMMARY STATISTICS                      WATER YEARS 1939 - 1969

ANNUAL MEAN                               190
HIGHEST ANNUAL MEAN                       435              1952
LOWEST ANNUAL MEAN                         65.8            1961
HIGHEST DAILY MEAN                       5520       Dec 24 1955
LOWEST DAILY MEAN                            .00    Jan  1 1939
ANNUAL SEVEN-DAY MINIMUM                     .00    Jan  1 1939
INSTANTANEOUS PEAK FLOW                  8800       Dec 24 1955
ANNUAL RUNOFF (AC-FT)                  137700
10 PERCENT EXCEEDS                        430
50 PERCENT EXCEEDS                        107
90 PERCENT EXCEEDS                           .02



STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1970 - 1996, BY WATER YEAR (WY)

          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

MEAN      107     72.4     91.9     80.3     79.9      126      264      479      317      206      158      110
MAX       441      327      568      410      400      522      975     1148     1788     1131      585      418
(WY)     1972     1984     1984     1984     1996     1996     1986     1985     1983     1983     1975     1971
MIN      .000     .020      .11     .001     1.60      .13      .39      .31     2.63      .75     13.6      .55
(WY)     1995     1991     1978     1995     1995     1995     1988     1988     1977     1981     1984     1970

SUMMARY STATISTICS           FOR 1995 CALENDAR YEAR        FOR 1996 WATER YEAR           WATER YEARS 1970 - 1996

ANNUAL TOTAL                       65538.02                  103187.75
ANNUAL MEAN                          180                        282                        175
HIGHEST ANNUAL MEAN                                                                        470              1983
LOWEST ANNUAL MEAN                                                                          55.6            1992
HIGHEST DAILY MEAN                   847     Jun 17            1210     Feb 21            2240       Jun  2 1983
LOWEST DAILY MEAN                       .00  Jan  1                .08  Nov 27                .00    Sep 13 1994
ANNUAL SEVEN-DAY MINIMUM                .00  Jan  1                .08  Nov 27                .00    Sep 13 1994
INSTANTANEOUS PEAK FLOW                                        1230     Feb 20            2520       Jul 17 1983
INSTANTANEOUS PEAK STAGE                                          4.79  Feb 20               6.11    Jul 17 1983
ANNUAL RUNOFF (AC-FT)             130000                     204700                     126600
10 PERCENT EXCEEDS                   530                        690                        453
50 PERCENT EXCEEDS                   123                        202                         77
90 PERCENT EXCEEDS                      .00                        .18                        .50

                    10344500  LITTLE TRUCKEE RIVER BELOW BOCA DAM, NEAR TRUCKEE, CA--Continued

                                              WATER-QUALITY RECORDS

PERIOD OF RECORD.--
  WATER TEMPERATURE:  April 1993 to current year.

PERIOD OF DAILY RECORD.--
  WATER TEMPERATURE:  April 1993 to current year.

INSTRUMENTATION.--Water-temperature recorder since April 1993.

REMARKS.--Water temperature is affected by regulation from Boca Dam.  There was extremely low flow on the days
   when the maximum and minimum temperature occurred.

EXTREMES FOR PERIOD OF DAILY RECORD.--
  WATER TEMPERATURE:  Maximum recorded, 19.5°C, July 20, 24, 1994; minimum recorded, 2.0°C, Nov. 26, 1994,
   Mar. 22, 23, 1995, Jan. 28, 29, 1996.

EXTREMES FOR CURRENT YEAR.--
  WATER TEMPERATURE:  Maximum recorded, 19.0°C, June 30; minimum recorded, 2.0°C, Jan. 28, 29.


                WATER TEMPERATURE, DEGREES CELSIUS, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996

DAY      MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN

           OCTOBER           NOVEMBER          DECEMBER          JANUARY           FEBRUARY           MARCH

  1     14.0    13.5      11.5    11.5       7.0     5.5       4.5     4.0       3.5     2.5       3.0     3.0
  2     14.0    13.5      11.5    11.0       7.0     6.0       5.0     4.0       3.5     2.5       3.5     3.0
  3     14.5    13.5      11.0    10.5       6.5     5.5       5.0     4.0       3.5     3.0       3.5     3.5
  4     14.5    13.5      11.0    10.0       7.0     5.5       5.0     4.0       3.5     2.5       3.5     3.5
  5     14.5    14.0      10.5    10.0       7.0     6.0       5.0     4.0       4.0     3.0       3.5     3.0

  6     14.0    14.0      10.5    10.0       7.5     6.5       5.5     4.0       4.0     3.5       3.5     3.0
  7     14.5    14.0      10.0    10.0       8.0     6.5       5.0     4.0       4.0     3.0       3.5     3.0
  8     14.5    14.0      10.0     9.5       7.0     6.0       5.0     4.0       4.0     3.0       3.5     3.0
  9     14.5    14.0      10.0     9.5       6.5     5.5       5.0     4.0       3.0     3.0       3.5     3.5
 10     14.5    14.0      10.0     9.5       6.0     5.0       5.5     4.0       3.0     3.0       3.5     3.5

 11     14.0    14.0      10.0     9.5       5.5     5.5       4.0     4.0       3.5     3.0       4.0     3.5
 12     14.0    14.0       9.5     9.5       6.0     5.5       4.0     4.0       3.5     3.0       4.0     3.5
 13     14.0    13.5       9.5     9.0       6.0     4.5       4.0     4.0       3.5     3.5       3.5     3.5
 14     13.5    13.0       9.5     9.5       6.0     4.0       4.0     4.0       3.5     3.5       4.0     3.5
 15     13.5    13.0       9.5     9.5       4.5     3.5       4.0     4.0       3.5     3.5       4.0     4.0

 16     13.5    13.0       9.5     9.0       4.0     4.0       4.0     4.0       4.0     3.5       5.0     4.0
 17     13.5    13.0       9.5     9.0       4.5     4.0       5.0     4.0       4.0     4.0       4.5     4.5
 18     13.5    13.0       9.5     9.0       4.5     4.0       4.5     3.0       4.5     4.0       4.5     4.5
 19     13.0    13.0       9.5     9.0       4.5     4.0       4.0     2.5       4.5     4.0       4.5     4.5
 20     13.0    13.0       9.5     9.0       4.5     4.0       4.0     3.0       4.0     4.0       4.5     4.5

 21     13.0    13.0       9.5     9.0       4.5     4.0       3.5     3.5       4.0     4.0       4.5     4.5
 22     13.0    12.5       9.0     8.5       4.5     3.5       3.5     3.0       4.0     3.5       4.5     4.5
 23     12.5    12.0       9.0     8.5       4.5     3.5       3.0     3.0       3.5     3.5       5.5     4.5
 24     12.0    12.0       8.5     8.0       4.5     3.5       3.5     3.0       3.5     3.5       5.5     5.0
 25     12.0    11.5       8.5     8.0       4.5     3.5       3.5     3.0       3.5     3.0       5.5     5.0

 26     12.0    11.5       9.0     7.5       4.5     3.5       3.0     3.0       3.5     3.0       5.5     5.0
 27     12.0    11.5       7.5     6.5       4.5     3.5       3.0     2.5       3.5     3.0       5.5     5.0
 28     12.0    11.5       7.0     6.0       4.0     3.5       2.5     2.0       3.5     3.0       5.5     5.0
 29     12.0    11.5       7.5     5.5       4.0     3.5       2.5     2.0       3.5     3.0       5.5     5.5
 30     11.5    11.5       6.5     5.5       4.0     3.5       2.5     2.5       ---     ---       5.5     5.5
 31     11.5    11.5       ---     ---       4.5     3.5       3.0     2.5       ---     ---       5.5     5.5

MONTH   14.5    11.5      11.5     5.5       8.0     3.5       5.5     2.0       4.5     2.5       5.5     3.0



                     10344500  LITTLE TRUCKEE RIVER BELOW BOCA DAM, NEAR TRUCKEE, CA--Continued

                WATER TEMPERATURE, DEGREES CELSIUS, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996

DAY      MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN       MAX     MIN

            APRIL              MAY               JUNE              JULY             AUGUST          SEPTEMBER

  1      6.0     5.5       8.0     7.5      10.5    10.5      12.5    11.5      13.0    12.5      14.0    13.0
  2      6.0     5.5       8.5     7.5      10.5    10.5      12.5    11.5      13.0    12.5      14.0    13.5
  3      6.0     6.0       9.0     7.5      11.0    10.5      12.5    11.5      13.0    12.5      14.0    13.5
  4      6.5     6.0       9.0     8.0      11.0    10.5      12.5    12.0      13.0    12.5      14.5    13.5
  5      6.0     6.0       9.0     8.0      11.0    10.5      12.5    12.0      13.0    12.5      14.0    13.5

  6      6.0     6.0       8.5     8.0      11.0    10.5      12.5    12.0      13.0    12.5      14.0    13.5
  7      6.0     5.5       8.5     8.0      11.0    10.5      12.5    12.0      13.0    12.5      14.5    13.5
  8      6.0     5.5       8.5     8.0      11.5    10.5      13.0    12.0      13.0    12.5      14.5    14.0
  9      7.0     5.5       8.5     8.0      11.5    10.5      13.0    12.5      13.0    12.5      15.0    14.0
 10      7.0     6.0       8.5     8.0      11.5    10.5      13.0    12.5      13.0    12.5      15.0    14.0

 11      7.0     6.0       8.5     8.5      11.5    11.0      13.0    12.5      13.0    12.5      15.5    14.5
 12      7.0     6.0       8.5     8.5      11.5    11.0      13.0    12.5      13.0    12.5      16.0    14.0
 13      6.5     6.0       9.5     8.5      11.5    11.0      13.0    12.5      13.0    12.5      15.5    14.5
 14      6.5     6.5       9.0     8.5      12.0    11.0      13.0    12.5      13.0    12.5      15.5    15.0
 15      7.0     6.0       9.0     8.5      12.0    11.0      13.0    12.0      13.5    12.5      15.0    14.5

 16      8.0     6.5      10.0     8.5      12.5    11.5      13.0    12.0      13.5    12.5      15.0    14.5
 17      7.5     7.0      10.0     8.5      12.5    11.5      13.0    12.0      13.5    12.5      15.0    14.5
 18      8.0     7.0       9.5     9.0      12.5    12.0      13.0    12.0      13.5    12.5      15.0    14.5
 19      7.5     7.0       9.5     9.0      13.0    12.0      13.0    12.0      13.5    12.5      15.0    15.0
 20      8.0     7.0       9.5     9.0      13.0    12.0      13.0    12.0      13.5    12.5      15.0    15.0

 21      7.5     7.0      10.0     9.5      13.0    12.5      13.0    12.0      13.5    12.5      15.5    15.0
 22      7.5     7.0      10.0     9.5      13.0    12.5      13.0    12.5      13.5    12.5      15.5    15.0
 23      7.5     7.0      10.0     9.5      13.0    12.5      13.5    12.0      13.5    13.0      15.5    15.0
 24      8.0     7.0      10.0    10.0      13.0    12.5      13.5    12.5      13.5    13.0      15.5    15.0
 25      8.0     7.5      10.0     9.5      13.0    12.5      13.0    12.5      13.5    13.0      15.5    15.0

 26      8.0     7.5      10.5    10.0      12.5    12.0      13.0    12.5      13.5    13.0      15.5    15.0
 27      7.5     7.5      10.5    10.0      15.0    11.5      13.0    12.5      13.5    13.0      15.5    15.0
 28      8.0     7.0      10.5    10.0      17.5    12.5      13.0    12.5      14.0    13.0      15.5    15.0
 29      8.0     7.5      11.0    10.0      18.0    14.5      13.5    12.5      13.5    13.0      15.0    15.0
 30      8.0     7.5      10.5    10.0      19.0    11.5      13.0    12.5      14.0    13.0      15.0    15.0
 31      ---     ---      10.5    10.5       ---     ---      13.0    12.5      14.0    13.0       ---     ---

MONTH    8.0     5.5      11.0     7.5      19.0    10.5      13.5    11.5      14.0    12.5      16.0    13.0